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  1. #1
    Road Train Member blanco's Avatar
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    Need help with transmission air leak... Eaton Fuller

    Truck came in with a leak from the "air control module" K3245 on an Eaton Fuller FRO 16210C transmisson.

    Driver went and bought a replacement but alas, as truck aired up, the leak started from the same "brand" new module.



    Has anyone had any expierence with this type of issue?

    This particular module is on top of the transmission on a 1999 Volvo VNL.

  2. #2
    Road Train Member blanco's Avatar
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    Another mechanic advised that it "could" be the selector on the top of the shifter.

  3. #3
    Bobtail Member
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    sometimes water gets into the cylinder for the range selector in the top cover. it corrodes in there and the piston cant move, so the air just leaks out. it could progress to the point that eventually you wont have low range anymore.

  4. #4
    Road Train Member blanco's Avatar
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    driver is getting it towed to a shop here in Atlanta. will post update as i get it.

  5. #5
    Road Train Member mitchtazz's Avatar
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    Quote Originally Posted by blanco View Post
    Another mechanic advised that it "could" be the selector on the top of the shifter.
    my dad lost the high side on his super ten once.. only had odd number gears and shifted like a five speed while loaded.. are was hissing out of the gear shift knob.. took it apart and found out that the rubber seal on the splitter had rolled (no lub) used the grease we use on the fifth wheel to lub it up and it worked fine for the rest of the fruit season. last weekend i was trying to get my gear shift knob threw a knew boot i bought and i didn't want to cut the boot or remove the air lines so i took the knob apart. ended up putting the hi/lo range selector switch on backwards and it started hissing as soon as the truck built up air pressure. shut the truck off took it back apart and flipped it over and it was good as new. let us know what the underlining cause is.. knowledge is power!!! share the wealth.

  6. #6
    Light Load Member
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    Check the range piston on the back of the trans.

  7. #7
    Bobtail Member
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    FRO transmission range selector is located inside the transmission under the top cover.they're well known to leak.easy fix,low cost around 40.00 for rebuilt kit.also check the o-rings under the air module.

  8. #8
    Road Train Member Pablo-UA's Avatar
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    I sugest bad range valve.....

  9. #9
    Road Train Member
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    i just started hearing a hissing in my shifter, right at the handle

    so it may be that i need to disassemble the handle and replace some bushings?

    where do i get the new parts from?

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